Ginkgo from Lower Cretaceous Changcai Formation in Helong of Jilin, NE China
SUN Yue-wu;WANG Yu-xin;WEI Wen-yan
1. Research Center of Palaeontology & Stratigraphy, Jilin University, Changchun 130026, China; 2. College of Earth Sciences, Jilin University, Changchun 130061, China